You can call the police. This is a case of theft of public security. Let the police check, and then you think about where to put the card, who can get your card, put it back, sort out suspicious things, and then find the person according to the fingerprints on the card. (Of course, this kind of trace may be difficult to get in actual operation, which can scare the perpetrators. )
Suspicious objects, the police will talk to them, and if they can't find them, it depends on the police's ability.
You don't need a lawyer. Lawyers have no right to investigate.
It's not a criminal case. The public security case is fine. Did the police give you a record? If you don't think it's a public security case, I'll tell you why. It's not that simple. You can complain to the inspector's office.